• Register


Information for users from the old Q&A site
If you have an account from our old Q&A site, your account was transferred over, but you need to reset your password and confirm your email address.
Reset Password here
Confirm Email here

1,726 questions

3,056 answers

783 comments

7,356 users

what is this-wood opal,sedimentary stones?pretty colors into water(765g)

0 votes

asked Sep 2, 2015 by dodi71 (330 points)

1 Answer

+1 vote
The yellow staining looks like limonite which is a ferrous hydroxide compound found in many rocks where iron is common. FeO(OH). I have hundreds of these as they are very striking when I am looking for Lake Superior Agates.
answered Sep 2, 2015 by Weasel (36,030 points)
blue azurit?

Related questions

0 votes
2 answers
asked Aug 27, 2015 by dodi71 (330 points)
0 votes
2 answers
0 votes
1 answer
asked Jun 13, 2015 by Andrea Hirsch (120 points)
 


...